<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item  :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
                </el-col>
            </el-row>
            <!-- 角色列表区域 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row v-for="(item1, i1) in scope.row.children" :key="item1.id" :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for循环嵌套渲染二级权限 -->
                                <el-row v-for="(item2, i2) in item1.children" :key="item2.id" :class="[ i2 === 0 ? '' :'bdtop', 'vcenter']">
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag v-for="item3 in item2.children" :key="item3.id" type="warning" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index" label="序号"></el-table-column>
                <el-table-column prop="roleName" label="角色名称"></el-table-column>
                <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                         <!-- 修改 -->
                        <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">编辑</el-button>
                        <!-- 删除 -->
                        <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRoleById(scope.row.id)">删除</el-button>
                        <!-- 分配角色权限 -->
                        <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>

        <!-- 添加用户的对话框 -->
        <el-dialog
            title="添加角色"
            :visible.sync="addDialogVisible"
            width="50%"
            @close="addDialogClosed"
            >
            <!-- 内容主体区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="addForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="addForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRoles">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 修改用户对话框 -->
        <el-dialog
            title="修改角色"
            :visible.sync="editDialogVisible"
            width="50%"
            @close="editDialogClosed">
            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px">
                <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="editForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc">
                    <el-input v-model="editForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRoleInfo">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 分配权限的对话框 -->
        <el-dialog
            title="分配权限"
            :visible.sync="setRightsDialogVisible"
            width="50%"
            @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightsDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data() {
        return {
            // 所有角色列表
            rolelist: [],
            // 控制分配权限对话框的显示与隐藏
            setRightsDialogVisible: false,
            // 所以权限的数据
            rightslist: [],
            // 树形控件的属性绑定对象
            treeProps: {
               children: 'children',
               label: 'authName'
            },
            // 默认选中的节点的Id值数组
            defKeys: [],
            // 当前即将分配权限的角色id
            roleId: '',
            // 控制添加角色对话框的显示与隐藏
            addDialogVisible: false,
            // 添加角色的表单数据
            addForm: {
                roleName: '',
                roleDesc: ''
            },
            // 添加角色的验证规则对象
            addFormRules: {
                roleName: [
                  { required: true, message: '请输入角色名称', trigger: 'blur' },
                  { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                ],
                roleDesc: [
                  { required: true, message: '请输入角色描述', trigger: 'blur' },
                  { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                ]
            },
            // 控制编辑角色对话框的显示与隐藏
            editDialogVisible: false,
            // 查询到角色信息对象
            editForm: {
                roleName: '',
                roleDesc: ''
            },
            // 修改角色表单的验证规则对象
            editFormRules: {
                roleName: [
                  { required: true, message: '请输入角色名称', trigger: 'blur' },
                  { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                ]
            }
        }
    },
    created() {
        // 获取所有的角色
        this.getRolesList()
    },
    methods: {
        // 获取所有角色列表
        async getRolesList() {
            const { data: res } = await this.$http.get('roles')
            if (res.meta.status !== 200) {
                return this.$message.error('获取角色列表失败')
            }

            this.rolelist = res.data
            // console.log(this.rolelist)
        },
        // 根据Id删除对应的权限
        async removeRightById(role, rightId) {
            // 弹框提示用户是否要删除
            const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            if (confirmResult !== 'confirm'){
                return this.$message.info('取消了删除')
            }
            // console.log('确认删除')
            const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if (res.meta.status !== 200) {
               return this.$message.error('删除权限失败')
            }
            // this.getRolesList()
            role.children = res.data
        },
        // 展示分配权限的对话框
        async showSetRightDialog(role) {
            this.roleId = role.id
            // 获取所有权限的数据
            const { data: res } = await this.$http.get('rights/tree')
            if (res.meta.status !== 200){
                return this.$message.error('获取权限数据失败')
            }
            // 获取到的权限数据保存到data中
            this.rightslist = res.data
            // console.log(this.rightslist)
            // 递归获取三级节点的Id
            this.getLeafKeys(role, this.defKeys)

            this.setRightsDialogVisible = true
        },
        // 通过递归的形式，获取角色下的三级权限的Id，并保持到defKeys数组
        getLeafKeys(node, arr) {
            // 如果当前 node 节点不包括children 属性，则是三级节点
            if (!node.children) {
                return arr.push(node.id)
            }
            node.children.forEach(item => {
                this.getLeafKeys(item, arr)
            })
        },
        // 监听分配权限对话框的关闭事件
        setRightDialogClosed() {
            this.defKeys = []
        },
        // 点击为角色分配权限
        async allotRights() {
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            // console.log(keys)
            const idStr = keys.join(',')

            const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
            if (res.meta.status !== 200) {
                return this.$message.error('分配权限失败')
            }
            this.$message.success('分配权限成功')
            this.getRolesList()
            this.setRightsDialogVisible = false
        },
        // 监听添加角色对话框的关闭事件
        addDialogClosed() {
            this.$refs.addFormRef.resetFields()
        },
        // 添加角色
        addRoles() {
            this.$refs.addFormRef.validate(async valid => {
                if (!valid) return
                const { data: res } = await this.$http.post('roles', this.addForm)
                if (res.meta.status !== 201) {
                    return this.$message.error('角色创建失败')
                }
                this.$message.success('角色创建成功')
                this.addDialogVisible = false
                this.getRolesList()
            })
        },
        // 展示编辑角色的对话框
        async showEditDialog(id) {
            // console.log(id)
            const { data: res } = await this.$http.get('roles/' + id)
            if (res.meta.status !== 200) {
                return this.$message.error('查询失败')
            }
            this.editForm = res.data
            console.log(this.editForm)
            this.editDialogVisible = true
        },
        // 监听修改角色对话框的关闭事件
        editDialogClosed() {
            this.$refs.editFormRef.resetFields()
        },
        // 修改角色信息并提交
        editRoleInfo() {
            this.$refs.editFormRef.validate(async valid => {
                console.log(valid)
                if (!valid) return
                // 发起修改角色信息数据请求
                const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, {
                    roleName: this.editForm.roleName,
                    roleDesc: this.editForm.roleDesc
                })
                if (res.meta.status !== 200) {
                    return this.$message.error('更新角色信息失败')
                }
                // 关闭对话框
                this.editDialogVisible = false
                // 刷新数据列表
                this.getRolesList()
                // 提示修改成功
                this.$message.success('更新角色信息成功')
            })
        },
        // 根据 roleId 删除对应的角色信息
        async removeRoleById(id) {
            // console.log(id)
            // 弹框询问用户是否删除数据
            const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
              }
            ).catch(err => err)
            if (confirmResult !== 'confirm') {
                return this.$message.info('已取消删除')
            }
            console.log('已删除')
            const { data: res } = await this.$http.delete('roles/' + id)
            if (res.meta.status !== 200) {
                return this.$message.error('删除角色失败')
            }
            this.$message.success('删除角色成功')
            this.getRolesList()
        }
    }
}
</script>

<style lang="less" scoped>
.el-tag{
    margin: 7px;
}
.bdtop{
   border-top: 1px solid #eee;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>
